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J. W. EASTON.

GOMMUTATOR CONNECTION FOR DYNAMO ELECTRIC MACHINES. No. 373,971. Patented Nov. 29, 1887.

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ERS. Phohrtfihnqmaher, Washington. 0.1:.

UNITED STATES PATENT OFFIC JAMES w. EASTON, on NEW YORK, N. Y.

COMMUTATOR-CONNECTION FOR DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 373,971;- dated November 29, 1887.

Application filed April 13, 1886. Renewed May 3, 1887. Serial No. 236,669. (No model.)

To all whom it, may concern..-

Be it known that 1, JAMES W. EASTON, a subject of the Queen of Great Britain, residingin New York, in the county and State of New York, have invented certain new and useful Improvements in Devices for Connecting Armature-Coils with Oommutator-Plates of Electric Machines, of which the following is a specification.

The invention relates to the means employed for connecting the terminals of the bobbins of armature-coils with the collector or commutator brushes of an electric machine-snch, for instance, as a dynamo-electric generator.

The object of the invention is to provide means for conveniently attaching or connecting the parts, so thatthejar occasioned by the motion of the armature and therelative move ments of the parts shall not, by constantly bending the connection, cause it to break. and thus cause injury to the machine and a cessation of the current.

The invention consists in providing a yielding or flexible coupling whichextends between each end of each bobbin and the corresponding commutator-plate, and which may armature-bobbin or section of the same, together with one terminal of its wires, asshown at B. A com mutator-plate is represented at O, and this has formed upon italng orprojection, 0, extending toward the armature-bobbin. A coil-spring of any suitable resilient conducting material, D,-is employed for connecting the two parts. By compressing this spring it is readily slipped over the projection c and the end B of the armature-coil; The spring is made of such length that it will be retained under more or less tension when thus in position between the parts, and this will insure a Referring to the figures, A represents an reliable electric connection. If desired, the respective ends of the spring may be soldered to the end of the armature-coil and the projection 0, while the intervening portion will afford sufficient ela ticity to prevent the jar of the machine and the relative movements of the parts from doing injury and from breaking the connection between the coupling and the connected parts; but usually it is unnecessary to solder the parts, for the pressure of the spring is'found to be sufficient to maintain good electrical connections.

In some instances it is desirable to employ fusible connections between the-bobbin-joints and the commutator-plates, so that the connections will be interrupted should the currents produced be such as to endanger the bobbins by overheating them. In an application of even date herewith, Serial No. 198,685, there is described and claimed a fusible connection for such purpose.

By making the fusible wire or strip in the form ofa coil-spring, as above descri'bedaflexi ble fusible coupling or connection is formed and certain ad vantages of both are secured.

In the drawings, brepresents the wireleading from the next preceding bobbin,which is fastened to the end of the bobbin B by being wound around it and soldered in a manner well understood, the end I) projecting therefrom and receiving the spring D.

In Fig. 2'the endof the spring D is repre sented as entering a small aperture, 0, in the plate 0, instead of extending over a projection upon the same. This construction may be found more desirable in some instances than the one shown in Fig. 1.

It is evident that for the purpose of repairing the machine the spring maybe readily removed and replaced.

I claim as my invention- 1. The combination,with the armature-bobbin of an electric machine and a commutator or collector plate, of a compressible yielding connection between the .two parts, substantially as described.

2. The combination, with an armature'coil of an electric machine and a collector-plate, ofacoil-spring connecting the two electrically.

3. The combination,with an armature and a. commutator or collector plate, of a coil-spring surrounding the end of the wire of the armature and pressing against the commutatorplate, substantially as described.

4. The combination, with the conductor of an armature-bobbin, of a commutator or collector plate, a projection upon the same, and a coil-spring surrounding said projection and said conductor and pressed between them, substantially as described.

5. The combination, with the conductor of an armature-bobbin, a commutator or collector plate, a projection upon the same, and a coilspring surrounding said projection and said conductor and soldered thereto.

6. The combination,with the armature-bobr5 bins of an electric machine and the cornmutator or collector plates, of afusible compressible connection between the same, substantially as described.

In testimony whereof Ihave hereunto sub- 20 scribed my name this 17th day of March, A.

JAMES W. EASTON.

Witnesses:

ISRAEL MATsoN, CHARLES A. TERRY. 

